Eur J Cancer:DNA损伤修复状态对卡巴他赛治疗转移性去势抵抗性前列腺癌的活性的影响

2021-11-09 Nebula MedSci原创

DNA损伤修复状态对卡巴他赛治疗转移性去势抵抗性前列腺癌的活性的影响

既往研究显示,卡巴他赛(Cabazitaxel)可改善转移性去势抵抗性前列腺癌 (mCRPC) 患者在阿比特龙/恩杂鲁胺和多西他赛治疗失败后的总生存期 (OS),尽管 DNA 损伤修复 (DDR) 缺陷的存在带来的好处尚不清楚。随着聚(二磷酸腺苷-核糖)聚合酶抑制剂 (PARPi) 与卡巴他赛部分重叠适应症的出现,研究人员对DNA损伤修复缺陷的存在对卡巴他赛治疗效果的影响越来越有兴趣。

本研究旨在明确DNA损伤修复状态对卡巴他赛治疗mCRPC患者的疗效的影响。

这是一项前瞻性的多中心研究,招募了进行了DDR肿瘤组织分析的接受卡巴他赛治疗的mCRPC患者。至少携带一种有害胚系或体细胞变异的患者被认为是DDR阳性 (DDR+)。每个DDR+患者都与来自同一机构并接受相同测试的DDR阴性 (DDR-) 相配对分析。探索性队列通过液体活检发现DDR+的患者也被纳入分析。评估了前列腺特异性抗原(PSA)降低≥50%(PSA50)患者比例、PSA无进展生存期(PSA-PFS)、影像学PFS(rPFS)、临床PFS或影像学PFS(c/rPFS)和总生存期。

根据组织分析DDR状态分组的患者的预后分析

在190位有组织测序数据的患者中(95位 DDR+,95位 DDR-),DDR+和DDR-组患者经卡巴他赛治疗后获得PSA50的患者比例分别是32%(29/92)和36%(33/92;p=0.64)。DDR+和DDR-组患者的中位rPFS分别是5.33个月 vs 5.75个月(p=0.55);中位总生存期分别是15.4个月和11.5个月(p=0.036)。在既往接受过PARPi治疗过的携带BRCA1/2变异的患者(n=10)中,未观察到卡巴他赛治疗的PSA50反应。

根据液体活检DDR状态分组的患者的预后分析

在液体活检队列中观察到了类似的结果(DDR+, n=63)。

综上,该研究结果表明,DNS损伤修复缺陷的存在与否,都不影响转移性去势抵抗性前列腺癌患者接受卡巴他赛治疗的效果,但卡巴他赛用于既往接受过PARPi治疗的患者中的活性较低。

原始出处:

Aldea Mihaela,Lam Laurent,Orillard Emeline et al. Cabazitaxel activity in men with metastatic castration-resistant prostate cancer with and without DNA damage repair defects.[J] .Eur J Cancer, 2021, 159: 87-97. https://doi.org/10.1016/j.ejca.2021.09.029

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    2022-08-10 yige2012
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